Modify access rules

Change-Id: I36c8787e51ca3a86686a0f61ca18c6b23d8eb4e3
Reviewed-on: https://go-review.googlesource.com/5590
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

groups

diff --git a/groups b/groups
index 7a52bae..39a3fc4 100644
--- a/groups
+++ b/groups
@@ -4,6 +4,7 @@
 28af6c56d29f40fcca6fef99686e58212a7177bf	trybot-result-changers
 420ead950461b5f205dd05e8a48e54ec518170b0	admins
 4f2daf1bf6c2e656cd8cb4f4416e65f3e5f05a76	gophers
+50396072908fc1bf97ed3163533dc7c7381bdbfb	may-start-trybots
 9bbaccd8cc87ef7211b1088bcc91a879a932237f	contributed-in-past
 a68e77fe594e959daaacc2fb670298964f78acfa	approvers
 global:Anonymous-Users                  	Anonymous Users

project.config

diff --git a/project.config b/project.config
index 3de488f..931fb56 100644
--- a/project.config
+++ b/project.config
@@ -36,6 +36,7 @@
 	submit = group approvers
 	editTopicName = group approvers
 	label-Run-TryBot = +0..+1 group approvers
+	label-Run-TryBot = +0..+1 group may-start-trybots
 	label-TryBot-Result = -1..+1 group trybot-result-changers
 [access "refs/meta/config"]
 	exclusiveGroupPermissions = read